JP5044545B2 - Wire rope remote monitoring system - Google Patents

Description

  The present invention relates to a system for remotely monitoring deterioration and abnormality of a wire rope used as a moving cord.

In addition to being used as a scoop, the wire rope is widely used as a moving cord for various equipment and devices. However, if a cutting accident occurs, there is a great possibility that it will cause enormous damage. In the event that the same applies to the following), it is important to immediately take action such as replacement.
This is especially true for critical equipment that cannot be suddenly stopped, and equipment that has the highest priority on maintaining safety, such as crane work vessels, ironworks ladle cranes, ropeways, gondola and other wire ropes used in dam gates. Is strong.

Periodic inspection is required to determine the deterioration of such wire ropes. However, since the inspection standards are not clear, conventionally, the rope diameter, disconnection, corrosion, wear, loss of shape, etc. have mainly been visually observed. Thus, an appearance inspection method for estimating the deterioration was taken.
However, this visual inspection method requires skill and has a large variation in accuracy due to individual differences. In addition, it takes time to inspect long ropes, and since the inspection cannot be performed unless the rope is stopped, continuous inspection of the entire length is difficult and it is difficult to stop operation at any time. Since inspection could not be performed, it was a problem for safety measures.

As an inspection means that can be carried out without stopping the movement of the rope, a leakage magnetic flux flaw detector called a rope tester is known. This device utilizes the fact that the wire rope is magnetized in the axial direction by the magnet built in the detector when the wire rope passes through the detection coil. In order to decrease, the magnetic flux leaks into the air, and the change of the leaked magnetic flux is detected by the detection coil and output as a signal.
However, even when such a magnetic flux leakage inspection device is used, the data is only output to an analog recorder or the like, and it is difficult to identify the abnormal part of the rope from the abnormal part on the data, and there is no judgment standard. In addition, there were problems such as oversight of abnormal parts.

  The present invention has been made to solve the above-mentioned problems, and the object of the present invention is to prevent deterioration of wire ropes used as moving lines in important facilities and facilities that cause serious accidents. Another object of the present invention is to provide a wire rope remote monitoring system capable of objectively continuously monitoring a remote place with high accuracy.

In order to achieve the above object, the present invention is connected to the measurement means by means for measuring the state of the wire rope and the communication means, and records, displays and accumulates the measurement data output from the measurement means, and has already been accumulated. The first monitoring device that determines whether there is an abnormality from the relationship with the measurement data and issues an alarm when there is an abnormality, is connected to the first monitoring device via the communication means, and the first monitoring device and the data are connected. A second monitoring device that delivers, checks the determination data of the first monitoring device again, makes a final determination and communicates to the first monitoring device ,
The wire rope state measurement object is a break, and the evaluation of the measured value is a weighted value for multiple levels of voltage due to the break in the measurement section, and the change over time of the evaluation value is inspected and allowed. It is characterized by using a determination program for determining an abnormality when the change rate exceeds a certain rate .

According to the present invention, without stopping the apparatus and equipment incorporating the wire rope, the operation is maintained, and there is no expert for determining the deterioration / abnormality of the rope at the wire rope use site. In addition, it is possible to automatically monitor the deterioration status and abnormal status of the rope automatically.
Further, the first monitoring device not only automatically issues an alarm when there is an abnormality by determining the presence / absence of an abnormality from the relationship with the data stored by processing the measurement data sent from the measuring means. The remote monitoring device that has received the notification of the occurrence of the abnormality determines whether or not there is an abnormality again, and issues a command such as rope replacement to the first monitoring device as a final determination. As a result, it is possible to achieve both the optimization of the rope replacement time and the economic efficiency, thereby establishing a safe rope use condition.
Furthermore , since it is sufficient to use a computer and a software program together with the existing measuring means, it is possible to implement at a relatively low cost.
Moreover, even if the degree of deterioration at the end of a certain period of time is the same, if the rate of change in the process leading to this is abrupt, it is judged as abnormal, so it can cope with sudden abnormalities and keep safety high. It becomes possible.

(A) is explanatory drawing which shows the whole wire rope remote monitoring system by this invention, (b) is explanatory drawing which shows the detail of (a). It is explanatory drawing which shows an example of the wire rope remote monitoring system by this invention. It is explanatory drawing which shows an example of a measuring device. It is a flowchart of the monitoring system concerning this invention. (A) is a display screen figure of measurement data, (b) is a display screen figure at the time of measurement. (A) (b) (c) is a graph which shows the change of the measurement voltage corresponding to the increase in the frequency | count of a driving | operation. (A) is a graph which shows the relationship between an evaluation value and a residual intensity rate, (b) is a graph which shows the relationship between time and an evaluation value by two patterns. It is a graph which shows a signal voltage value. It is a graph which shows the signal area value in FIG. It is a graph which shows the relationship between a signal voltage and residual intensity | strength. It is a graph which shows the relationship between a signal area value and residual intensity. It is a graph which shows the relationship between a signal voltage and residual intensity | strength. It is a graph which shows the relationship between a signal area value and residual intensity. It is a graph which shows the whole waveform and enlarged waveform in a certain driving frequency. It is a graph which shows the whole waveform when a driving | operation further increases from FIG. 14, and an enlarged waveform. It is a graph which shows the whole waveform and expansion waveform when a driving | operation further increases from FIG. It is a graph which shows the relationship between the frequency | count of a driving | operation of FIGS. 14-16, and a signal voltage. It is a graph which shows the relationship between the frequency | count of a driving | operation of FIGS. 14-16, and a signal area. It is a graph which shows the relationship between the frequency | count of an actual driving | operation, and the number of disconnections. It is a graph which shows transition of the signal area for every driving frequency with two patterns. It is a graph which shows the content of FIG. It is explanatory drawing which shows the 2nd Example of this invention. It is an example of measurement data which shows a time-dependent change of a rope diameter.

Explanation of symbols

1 Crane (equipment)
2 Wire rope 3 Measuring instrument 6 First monitoring device 6a Computer 7 Second monitoring device 7a Computer

The first monitoring device sets the measurement conditions of the measuring means and instructs the start and stop of the measuring means under the conditions, and records the measurement data sent from the measuring means and displays it on the monitor Recording / display unit that collects data, collecting unit that saves and accumulates data, judgment function unit that analyzes the data collected and collected, and determines whether there is an abnormality, and an abnormality that exceeds the value or level set in the judgment function unit occurs A communication unit that communicates with the second monitoring device when it is determined that the data has been recorded and transmits recorded data in response to a request / instruction from the second monitoring device. A data request determination unit that checks whether an abnormality occurrence report sent from the first monitoring device and requests detailed data such as image data and numerical data is sent, and is sent from the first monitoring device. The Analyzes over data has a determining determining function unit whether the necessity of the rope replacement, the command notification portion for transmitting the result to the first monitoring device.

Preferably, the measurement section is divided in the longitudinal direction of the rope, the increase with time of the measured value in each time in the same section is analyzed, and whether there is an abnormality is determined by whether the increase rate exceeds a certain reference value.
According to this, since the rope deterioration is objectively determined quantitatively, not based on the intuition of experience, etc., there is no variation in the results, the determination time can be shortened, and the measurement data can be accumulated. As the number increases, feedback to the actual results is possible, and the accuracy can be increased.

The wire rope state measurement object is a break, and the evaluation of the measured value is a weighted value for multiple levels of voltage due to the break in the measurement section, and the change over time of the evaluation value is inspected and allowed. A determination program is used to determine that an abnormality occurs when the change rate exceeds a certain rate.
According to this, even if the degree of deterioration at a certain period of time is the same, if the rate of change in the process leading to this is abrupt, it is determined that there is an abnormality. It can be kept high.

Wire rope state The subject of measurement is a break, and the rate of change at which the change of the integrated value is detected each time the operation is detected, based on the integral value (signal area value) from the break voltage value in the measurement section. Use a judgment program that determines that an abnormality occurs when the value is larger than.
According to this, in addition to the above-described effect, the degree of occurrence of disconnection can be easily recognized, so that the accuracy of determination can be improved.

Embodiments of the present invention will be described below with reference to the accompanying drawings.
FIG. 1 and FIG. 2 show an example in which the present invention is applied to rope deterioration remote monitoring in a marine vessel such as a crane vessel. Reference numeral 3 denotes a measuring device arranged at an appropriate position on the moving route of the wire rope 2, which is near the top of the pole in this example, but is not limited thereto.
Reference numeral 4 denotes a control panel arranged in the vicinity of the measuring instrument 3, which is equipped with a controller 4a and a wireless LAN unit 4b for data transfer. Reference numeral 5 denotes a wireless LAN antenna, and reference numeral 6 denotes a first monitoring device, which is installed in the monitoring room B on the ship.
7 is a second monitoring device installed at a remote place, for example, a monitoring station C in Japan, and 8 is a transfer antenna installed on the ship, which communicates via the communication satellite D, for example from an antenna for Inmarsat. It has become.

  In this example, the measuring device 3 uses a leakage magnetic flux flaw detection device, and as shown in FIG. 3, the main body detects a leakage magnetic flux when a magnet 3a that magnetizes the wire rope and a broken wire are present. A detection coil 3b and an acceleration sensor 3c for detecting a speed when the wire rope moves in the magnetic field are provided. The external detection unit has means for correcting the electromotive force detected by the detection coil 3b based on the acceleration detected by the acceleration sensor 3c. The correction means is detected by the detection coil 3b. The correction circuit 30 corrects and outputs the corrected signal based on the acceleration, and the correction amount adjustment circuit 31 sends the correction value to the correction circuit based on the acceleration signal detected by the acceleration sensor 3c. The correction amount adjustment circuit 31 calculates the degree to which the detection signal level is raised or lowered so as to make the detection signal level constant regardless of the relative acceleration between the detection coil 3b and the wire rope, and supplies the correction circuit 30 as a correction signal. input. Although not shown, it goes without saying that an amplifier, a filter, a detector, and the like are provided.

Because the wire rope is made of hard steel wire (carbon steel), which is a ferromagnetic material, if the wire rope is strongly magnetized in the axial direction by the magnet of the magnetization detector, local cross-sectional area changes such as wire breakage, Leakage flux changes. The amount of change in the leakage magnetic flux is detected by the detection coil 3b and converted into an electric signal to find an abnormality. Specific examples of specifications are applicable rope diameter: 40 to 60 mm, measurement speed: 15 to 90 m / min, magnetization method: DC magnetization by a permanent magnet.
In general, the larger the cross-sectional area change, the larger the signal, and the magnitude of the signal is proportional to the measurement speed. However, the moving speed of the wire rope is not constant, and when the rope moves quickly in the magnetic field, the disturbance of the magnetic field due to the broken wire or lift noise increases, and a small broken wire or lift noise is detected. The On the other hand, when the speed of the wire rope is slow, a situation in which even a large disconnection is not detected occurs. Therefore, as described above, the acceleration sensor and the correction means are used together, and even if the speed of the wire rope changes, the detection signal level can be raised or lowered accordingly, and the strands can be detected with a constant detection accuracy. Can be measured.

The controller 4a of the control panel 4 is means for A / D converting and recording the detection signal output from the measuring instrument 3, and the digitized measurement data is monitored by a wireless LAN via a LAN unit. 6 is transferred.
The first monitoring device 6 includes a computer 6a and a wireless LAN antenna 6b. The computer 6a sets the measurement conditions of the measuring instrument 3 and records the measurement data sent from the measuring instrument 3 and a measurement control unit that instructs the control panel 4 to start and stop the measuring instrument 3 under the conditions. A recording / display unit that displays on the monitor, a collection unit that stores and accumulates measurement data, a determination function unit that analyzes the stored and collected measurement data and determines whether there is an abnormality, and preset values and levels A communication unit is provided that communicates with the second monitoring device 7 when it is determined that an abnormality has occurred, and transmits recorded measurement data or the like in response to a request / instruction from the second monitoring device 7. .

The second monitoring device 7 is located in a remote place where there is an expert for determining the deterioration / abnormality of the rope, and similarly to the first monitoring device 6, includes a computer 7a and an internet connection device 7b.
The computer 7a checks an abnormality occurrence report sent from the determination function unit of the first monitoring device 6 via the Internet connection device 7b, and determines whether or not to make a detailed data request such as necessary data such as image data and numerical data. A data request determination unit that analyzes the data sent from the first monitoring device 6, determines whether or not the rope needs to be replaced, and transmits the result to the first monitoring device 6. A command notification unit is provided, and the command notification unit includes a function for instructing a change in measurement conditions such as an interval and a determination condition such as a program. In the first monitoring device 6 that has received a command from the command notification unit, measurement or determination is performed under the commanded measurement condition or determination condition.

  It should be noted that the determination function unit that analyzes the stored and collected measurement data in the first monitoring device 6 and determines whether or not there is an abnormality and the abnormal detailed data in the second monitoring device 7 are analyzed, and the necessity of rope replacement is analyzed. The determination function unit for determining presence / absence, the data request determination unit, and the like are constructed as software.

Measurement is basically performed by dividing the measurement section in the rope longitudinal direction and continuously detecting the leakage magnetic flux voltage in this example while moving the rope at a required speed. The measurement data is preferably obtained by speed correction processing using an acceleration sensor and correction means as described above.
Then, the measurement data is wirelessly transferred from the control panel 4 to the computer 6a of the first monitoring device 6, and the measurement data is stored. The measurement is performed at regular intervals, and the measurement data in the same category is displayed and recorded every time, the change with time is analyzed by the determination function unit, and when it is determined that the value exceeds a certain standard or the rate of increase, The occurrence of the abnormality is transmitted to the computer 7a of the second monitoring device 7.

  FIG. 4 shows an example of a monitoring chart according to the system of the present invention. In preparation for operation, the detector 3 and the controller 4a are connected by a dedicated cable, while the detector 3 is installed at a predetermined place, and then the controller 4 Set up. This turns on the channel to be measured (1ch) and selects the measurement speed changeover switch. Then, it is confirmed whether the direction of the wireless LAN antenna is normal, and the antenna on the monitoring room side is directed toward the detector-side antenna 5. Also make sure that Inmarsat's phone is connected.

  For the computer 6a of the first monitoring device 6, a LAN cable, a telephone line cable, and a power cable are connected to the computer, and the power is turned on. Confirm that the program is started, and enter the IP address of the LAN, the connection PORT, and the address to send mail in the communication settings. Also, mail communication settings (message confirmation time, transmission / reception interval, end time) are made. In the measurement settings, a rope speed (actual speed), a determination level (for example, 2V) value, a determination start position (for example, 2 m) are set, and a data storage folder name is input.

  Next, set the time trigger in the measurement settings. When measuring once a day (starting at a certain time), check the measurement time and enter the measurement start time. For interval measurement, check the interval and enter the measurement interval. Finally, input the measurement time (for example, MAX 30 minutes) and click the setting button. Thereby, measurement is automatically started at the set time.

  For setting modes other than time trigger, select manual trigger or simple measure. In the case of a manual trigger, measurement starts simultaneously with the click of the measurement start button. In the case of a simple measure, format the measurement preparation, measure at the start of measurement, and end at the end of measurement. In addition, an encoder trigger is also adopted. This is a mode in which a rotary encoder attached to the measuring instrument 3 is used as shown in FIG. 2, and measurement is started by an output from the encoder when the rope moves. This encoder output can record the moving distance of the rope, and can specify the measurement point of the rope.

After the above preparation operation, a start command is transmitted from the computer 6a to the controller 4a of the detector 3 via the wireless LAN, and measurement is started. The controller 4a takes in the data of the set time, A / D converts the measured electrical signal, records it as a digital signal in the main body memory, and records it in the memory of the computer 6a by the wireless LAN, and also uses the measurement data as a monitor. indicate. In the text box of the computer 6a, the speed of the rope to be measured and the voltage of the judgment level are input in advance. The determination level is a voltage when performing the determination.
FIG. 5A shows a monitor screen before the start of measurement. The upper part is an overall graph of measurement data, the lower part is an enlarged graph, and the position selected in the overall graph is enlarged and displayed. FIG. 5B shows an example of measurement data, and high voltage (leakage magnetic flux) is output at five locations. The measurement data is obtained by correcting the detection signal of the detection coil based on the acceleration sensed by the acceleration sensor.

Such data is stored and accumulated in the collection unit of the computer 6a every time measurement is performed, and the determination function unit analyzes whether or not a predetermined reference (setting) is exceeded, and determines abnormality. FIGS. 6A, 6B, and 6C show examples of changes over time in the waveform of measurement data. FIG. 6A shows, for example, a voltage waveform at 340,000 times, and FIG. It can be seen that disconnection occurred. (C) has shown the voltage waveform at the time of 560,000 times, and it turns out that the disconnection has increased.

Here, as a method of judgment (evaluation) of data in the judgment function unit, there is an evaluation based on a voltage level. This is because a maximum leakage magnetic flux voltage after a lapse of time is set, and when a value exceeding this is generated, it is determined that there is an abnormality. For example, when the maximum leakage magnetic flux voltage after aging is set to 4 V, the data after one year is a maximum of 1.8 V, and the data after two years is a maximum of 4.9 V, it is determined as abnormal.
However, for example, if the data after 2 years is a maximum of 3.5V, which does not reach the set level, but a large number of values appear in a certain section, an abnormality should occur for safety measures. In the above criteria, there is a possibility that it is determined to be normal and lacks appropriateness.

Therefore, the present invention proposes an appropriate evaluation method. The first aspect of the preferred evaluation method is to check the level of a certain level of voltage within a certain measurement interval and the number of data exceeding that (time or length). For example, when the voltage exceeds 1 V, the weight is 1. Point (number of data), 0.5 seconds, between 10 mm. The number of data may be the number of voltages.
Then, the voltage levels are set to several levels and weighted. For example, over 1V: weight 1:50 points (number of data), over 2V: weight 2:30 points (number of data), over 3V: weight 3:15 points, over 4V: weight 4: 5 points (number of data) If there is, then 1 × 50 + (2-1) × 30 + (3-2) × 15 + (4-3) × 5 = 100. Therefore, the influence of the voltage level can be reflected by increasing the weight of the high voltage value, for example, by setting the weight exceeding 3V to the weight 5 and the weight exceeding 4V to the weight 8.
Under the above conditions, the change in evaluation value with time (gradient of change) is observed, and when the rate of change is above a certain level, it is determined that the replacement is necessary.

For example, in the case where the evaluation value is one year later: 10, two years later: 20, three years later: 30 (pattern A), in another case, one year later: five years, two years later: After 8 or 3 years: 30 (pattern B).
The maximum rate of change in these cases is 10 / year for pattern A and 22 / year for pattern B. Therefore, if the change rate of 20 / year or more is set to be an exchange level, the pattern A can be used, but the pattern B is determined to be exchanged, and it becomes possible to cope with sudden or sudden deterioration.
FIG. 7A shows the relationship between the evaluation value and the rope strength ratio, and the remaining strength ratio of 90% corresponds to the evaluation value 20. (B) has shown the relationship between time and an evaluation value, and since the pattern B is an angle exceeding the limit inclination angle, it is determined that the wire rope needs to be replaced.

  Next, the second aspect of the evaluation method in the judgment function unit of the present invention is based on the integrated value (signal area value) from the voltage value indicating the disconnection of a certain measurement section as a reference, and the integrated value for each number of operations. This is a method in which a change is detected, and an abnormality is determined when the magnitude of the change exceeds an allowable change rate.

More specifically, FIG. 8 shows a signal voltage value waveform due to disconnection, and the voltage is 4.4V. FIG. 9 shows the relationship between the disconnection and the signal area value in the case of FIG. In this example, the area is 120. The signal area value is an integral value of the length (position) of the waveform indicated by the voltage value shown in FIG. 8, and when data is subdivided at a constant speed, Σ (voltage value × number of data) is discrete. It can be obtained by means of an integral. This is automatically obtained by a calculation function in the judgment function unit. Compared to FIG. 8, the waveform in FIG. 9 is close to the normal distribution shape, and the waveform at a position other than the abnormal signal is flat. Therefore, it is possible to recognize the occurrence of disconnection without error.
If the speed of the rope in the data is not constant, the number of data per unit length decreases as the speed increases, so that the weight of the data can be corrected and added based on the speed. For example, when the speed difference is double, the data with double the speed may be multiplied by 2 to increase the weight of one data.

FIG. 10 shows the relationship between the voltage and the remaining rope strength when the number of data is 6, and FIG. 11 shows the relationship between the area (voltage × number of data) and the remaining rope strength. R ² means a correlation coefficient.
Applying the above example on the basis of the relationship between the residual intensity and the voltage, as shown in FIG. 12, it can be seen that the correlation coefficient is low and the error of the residual intensity estimation is large. For example, in the signal of FIG. 12, the voltage is about 4.4 V, and the remaining intensity is predicted in the range of 50 to 95%. In the safety side evaluation, 50% is adopted, so that it is evaluated that the general allowable strength is less than 80%, and is subject to rope replacement.

On the other hand, when the relationship between the area (voltage × number of data) and the residual intensity is used as a reference, it is as shown in FIG. 13, and it is predicted that the area decreases from a range exceeding 100 in a quadratic curve. The correlation coefficient is also very high.
In the case of the value 120 in FIG. 13, it is estimated that the residual strength is about 90%, and it can be used. However, a 10% strength drop has occurred, and it is determined that the rope needs to be prepared for replacement and regularly inspected.

Accordingly, it can be said that it is preferable to use the relationship between the area (voltage × the number of data) and the remaining intensity as the determination criterion for abnormality determination, not the relationship between the voltage and the remaining intensity.
14-16 has shown the time-dependent change of the waveform for every frequency | count of operation in a certain installation, and the upper stage of each figure is a whole waveform, and a lower stage is an enlarged waveform. The area was calculated | required using the lower stage. FIG. 14 shows 20,000 times of operation, FIG. 15 shows 30,000 times, and FIG. 16 shows 40,000 times. V indicates a voltage, and S indicates a signal area.
FIG. 17 shows the relationship between the voltage of FIGS. 14 to 16 and the number of operations, and FIG. 18 shows the relationship between the signal area value of FIGS. These are automatically obtained by a program in the judgment function unit. As shown in FIG. 17, the signal voltage is about 5 V and does not change much. On the other hand, the signal area value in FIG. 18 indicates that the area increases with the number of operations. FIG. 19 shows the result of examining the actual disconnection state, and it can be seen that the signal area value agrees well. Therefore, according to the present invention, the relationship between the signal area value and the number of operations is used as a determination factor, and the replacement is determined based on the waveform increase rate.

FIG. 20 shows the transition of the signal area (signal integrated value) for each number of operations. The pattern A has some deterioration from the beginning, but its increase is small. On the other hand, the pattern B has a large increase although deterioration is slow. Such a change is compared with a predetermined limit inclination, and when the inclination is large as shown in pattern B (a large increase), it is evaluated as dangerous, and a determination is made to replace the rope. For example, at 60,000 times, the pattern A has a signal area of 200 and the pattern B has 180, and the pattern A is worse when evaluated only by the absolute value, but the pattern B has a larger increase slope than the pattern A. It can be judged as dangerous. If the limit inclination is set to 150 / 10,000 times, the pattern A is 50 / 10,000 times and the pattern B is 170 / 10,000 times and exceeds the exchange standard at the time of 60,000 times.
The limit slope can be considered as the limit increase amount. In FIG. 21, the vertical axis indicates the amount of increase (slope) of the signal area. By obtaining the slope in this way and determining that it is dangerous if the threshold value is exceeded, the rope can be used accurately and accurately. Know the limits.

  The determination result is sent as an alarm by mail from the computer 6a of the first monitoring device 6 to the second monitoring device 7. In the received computer 6a of the second monitoring device 7, whether or not the rope needs to be replaced. Is sent from the computer 7a. The request data is image data, digital data, a program, and the like, and the computer 6 a of the first monitoring device 6 transmits the request data to the computer 7 a of the second monitoring device 7.

  In the computer 7a of the second monitoring device 7, the determination function unit analyzes the sent data, and further makes a final determination in consideration of the data change with time and comparison with past data. 1 to the computer 6a of the first monitoring device 6. In response to this, measures such as preparing new ropes and dispatching experts to the site will be taken. As a result, the rope can be exchanged so as not to hinder the operation of the local facilities, and the operation with high safety can be continued.

In the present invention, “rope measurement” is not limited to the case of disconnection detection. Measurement contents (: measurement means) other than disconnection include, for example, corrosion detection: total magnetic flux method, rope diameter reduction: outer diameter measurement device, deformation detection: pitch measurement device, position detection: rotary encoder, tension measurement: load cell, elongation Measurement: displacement meter, speed measurement: accelerometer, rotary encoder, vibration measurement: accelerometer, etc.

  FIG. 22 shows a second embodiment of the monitoring system according to the present invention. In addition to detecting the leakage magnetic flux by the rope tester 3 as a measuring means, the total magnetic flux data is taken out, and the outer diameter measuring instrument 9 is provided. Sequentially measure the rope diameter by placing it on the rope path, measure the position, tension, etc. at the sheave, A / D conversion process and record the detection signals converted to electrical signals, the digitized data is wireless The data is sent to the computer 6a of the first monitoring device 6 via the data collection board by LAN, and is analyzed by the determination function unit to make a comprehensive determination in consideration of the disconnection state. FIGS. 23 (a), (b), and (c) show temporal changes (new, 30,000 times, 50,000 times) of the rope diameter measured by the outer diameter measuring device 9, and the periodic diameter reduction has progressed. I understand that.

In this case, an evaluation point is set for each of disconnection, diameter reduction, corrosion, etc., and a program is set up to issue an alarm if the deterioration exceeds a certain evaluation point. With such a configuration, the necessity and timing of replacement can be remotely monitored with higher accuracy.
Note that the rope deterioration / abnormality determination in the present invention does not exclude a parameter as to whether the voltage exceeds the set maximum voltage, but also includes the combined use of this parameter and one of the two modes described above.

Claims (5)

A means for measuring the state of the wire rope and a communication means connected to the measuring means, recording, displaying and accumulating the measurement data output from the measuring means, and determining whether there is an abnormality from the relationship with the already accumulated measurement data The first monitoring device that determines and issues an alarm when there is an abnormality, is connected to the first monitoring device via the communication means, and passes data to and from the first monitoring device, and the first monitoring device determines A second monitoring device that checks the data again, makes a final decision and communicates it to the first monitoring device ,
The wire rope state measurement object is a break, and the evaluation of the measured value is a weighted value for multiple levels of voltage due to the break in the measurement section, and the change over time of the evaluation value is inspected and allowed. A wire rope remote monitoring system using a determination program for determining an abnormality when a change rate exceeding a predetermined rate is exceeded .   The first monitoring device measures the measurement conditions of the measurement means and instructs the start and stop of the measurement means under the conditions, and records the measurement data sent from the measurement means and displays it on the monitor Recording / display unit that collects data, collecting unit that saves and accumulates data, judgment function unit that analyzes the data collected and collected, and determines whether there is an abnormality, and an abnormality that exceeds the value or level set in the judgment function unit occurs A communication unit that communicates with the second monitoring device when it is determined that the data has been recorded and transmits recorded data in response to a request / instruction from the second monitoring device. A data request determination unit that checks whether an abnormality occurrence report sent from the first monitoring device and requests detailed data such as image data and numerical data is sent, and is sent from the first monitoring device. The The wire rope remote monitoring system according to claim 1, further comprising: a determination function unit that analyzes the data and determines whether or not rope replacement is necessary, and a command notification unit that transmits the result to the first monitoring device. . Use a judgment program that divides the measurement section in the longitudinal direction of the rope, analyzes the increase over time of each measurement value in the same section, and determines whether there is an abnormality based on whether the increase rate exceeds a certain reference value wire rope remote monitoring system according to claim 1, characterized in that. Wire rope state The subject of measurement is a break, and the rate of change at which the change of the integrated value is detected each time the operation is detected, based on the integral value (signal area value) from the break voltage value in the measurement section. claims 1 using the abnormality determination program is larger beyond to wire rope remote monitoring system according to 3. Measurements of wire rope, in addition to the disconnection detection, corrosion detection, wire rope remote monitoring system according to claim 1 comprising the rope diameter reduction detection, at least one of their shape detection.